Polygons
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Q1
In the given figure, value of x° + y° + z° is
Marks:1Answer:
360°
Explanation:
x° + 60° + z° + 40° + 80° + y°= 180° × 3
(Sum of three linear angles)
x° + y° + z °= 540° – 180°
x° + y° + z °= 360°^{ }

Q2
The angle formed between any side of a polygon and extended adjacent side outside the polygon is called an
Marks:1Answer:
exterior angle of the polygon.
Explanation:
The angle formed between any side of a polygon and extended adjacent side outside the polygon is called an exterior angle of the polygon.

Q3
Out of the following figure, the regular polygon is
Marks:1Answer:
Explanation:
A closed figure whose all sides are equal is called regular polygon. So, option (a) is correct.

Q4
An interior angle of a polygon is 100°. The measurement of its adjacent exterior angle will be...
Marks:1Answer:
80°.
Explanation:
An exterior angle + adjacent interior angle = 180°
exterior angle = 180 – 100°
= 80°

Q5
Out of the following figures, the regular polygon is
Marks:1Answer:
Explanation:
Because it has four equal sides.